Thermostatic circuit-closer



M. MOLONEY.

THERMOSTAT'IC CIRCUIT CLOSER.

' APPLICATION FILED AUG.30, 1916.

1 ,330,892. Patented Feb. 1?, i920.

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UNITED srn'rns PATENT QFFlQfll...

MATTHEW MOLONEY, 0F CHRISTCHURCH, NEIV ZEALANZD, ASSIGNOR TO- VIGILAN'I.

AUTOMATIC FIRE ALARM CDMPANY LIMITED, 0F CHRISTCHURCH, NEW

ZEALAND.

THERMOBTATIC CIRCUIT-CLOSER.

Patented Feb. 1'7, 1920.

Application filed ingest 30, 1916. Serial 'He. 117,682.

terminal of an electric circuit. A spring tends to force an insulated terminal held in the end of the lever into contact with a lower terminal of the electric circuit, and the said lever is normally held out of contact with the said lower terminal by a rod inclosed in and secured to the extremity of a sleeve fixed to the end of the casing.

Upon the outbreak of a fire the sleevebecomes heated and expands, thereby withdrawing the rod and allowing the terminal of the lever to come into contact with the said lower terminal and close the, electric circuit.

Any ordinary signal such as an electric hell or a falling shutter is included in the electric circuit.

The drawing herewith illustrates the invention:--

Figure 1, is a ratus,

Fig. 2, is a side elevation of the apparatus with the cover of the casing removed,

Fig. 3, is a sectional plan on line 3-8, Fig. 1,

Fig. l, is an elevation partly in section of the sleeve and rod.

The casing 5 is fitted with a cover 6 having a sheet clglass 7 through which the lever Bean be inspected. The lever is pivoted on a stud or pin 9 fixed to the casing 5. The end of the lever is fitted with a terminal 10 insulated from the lever by a bush or sleeve 11 and washers 12 and 13. A flexible silk covered wire 14 connects the terminal 10 to an upper terminal 14 mounted on a block 15 of insulating material fixed to the side elevation of the apps casing 5. A lowe'rtorrninal 16 with which:

the terminal 16 is adapted to come into contact is also mounted on the block 15. A spring 17, in compression between the lever 8 and the casing, tends to force the terminal 10 of the lever into contact with the lower terminal 16. A distance piece 18 of insulate ing material separates the upperterminal i l from the lower terminal 1 The lever 8 is made with a face 19. extending below the stud 9, and a rod 20 enters the casing 5 at a lower level than thesaid stud. A sleeve 21 inclosing the rod 20 is screwed into the end of the casing, and has a bush 22 for guiding the rod'20. The outer end of the sleeve has another bush 23 into which the rod is screwed, the end 24: of the rod being angular in cross section. A cap Q5l screwed upon the end of the sleeve covers the end 24 of the rod. The end of the cap 25 is milled and has holes 25 for inserting a Wire or the like for turning the said cap. The end 25 of therod is made of silver steel and is recessed and holds loosely a ball 25 made of silver steel, or the end of the rod is made hemispherical, to reduce friction against the face 19.

A conduit 25 is screwed, or otherwise securedyto the end or-back of the casing, through which wires 26. and 2'? of an electric circuit pass and are connected to the terminals 1% and 16 respectively. An ordinary electric hell or a falling shutter or other signal are included in the electric circuit of the wires 26 and 27. As the electric bell and the shutter are of any usual constructio'nthey are not shown in the drawing.

The end 2% permits the rod 20 to be readily turned in the bush 23 to adjust the distance of the terminal 10 in relation to the lower terminal 16.

Normally the rod 20 presses against the face 19 and prevents the terminal 10 from being forced into contact with the lower terminal 16 by the spring 17, and upon an out Letters Patent of the United States is 1. A thermostatic circuit closure comprismg a closed casing, a pivotally mounted lever located within the casing, a inovahletermh nal carried by and insulated from said lever, a second terminal within the casing, a flexible Nil J. My

current conductor connecting the movable terminal to the second terminal, a stationary terminal within the casing insulated from the second terminal, alarm circuit Wires extending into the casing and conntcted to the second and stationary terminals, said movable terminal being normally spaced away from the stationary terminal to maintain the alarm circuit open, n compression spring on the lever and urging the movable terminal toward seid stationery terminal, a heat operated expensible tube having; one of its ends secured to the casing and being located on the exterior of the wing and a rod fixed to the other end of the time, ex- Ailing into the casing end engaging the l(5"el' for normally ineintziii'iing the movable and stationery terminals eggort.

imgiroved alarm, comprising in comhinution, a casing, a lever pivoted at one end within said casing, contact members carried by said lever and casing an electric circuit including said contacts, and expansihle means secured to the exterior of said casing, including a member extending into said cas ing, and a ball loosely held in a recess in the inner end of said member and contacting with said lever, said means on expansion thereof moving said member to effect movement of said lever to carry said contacts into engagement.

In testimony where I have signed my nzune to this specification in the presence of two Witnesses.

lhlAT'll-IEW MOLON E Y.

\Vitnesses:

E. HYDE, F. L. EASTGATE. 

